How to create and manage files using Golang?

Steps to create and manage files in Go language: Use the os.Create function to create files. Open the file using the os.Open function. Use the File object's WriteString method to write to the file. Use the io.ReadAll function to read files. Use the os.Remove function to delete files.

How to use Go language to create and manage files

Create files

Use os.Create Function creates a new file:

package main

import (
    "fmt"
    "os"
)

func main() {
    f, err := os.Create("test.txt")
    if err != nil {
        fmt.Println(err)
        return
    }
    fmt.Println("File created successfully")
    defer f.Close()
}

Open a file

Open an existing file using the os.Open function :

func main() {
    f, err := os.Open("test.txt")
    if err != nil {
        fmt.Println(err)
        return
    }
    fmt.Println("File opened successfully")
    defer f.Close()
}

Write a file

Use the WriteString method of the File object to write a file:

func main() {
    f, err := os.OpenFile("test.txt", os.O_WRONLY, 0644)
    if err != nil {
        fmt.Println(err)
        return
    }
    _, err = f.WriteString("Hello, world!")
    if err != nil {
        fmt.Println(err)
        return
    }
    fmt.Println("File written successfully")
    defer f.Close()
}

Read a file

Use io.ReadAll function to read files:

func main() {
    f, err := os.Open("test.txt")
    if err != nil {
        fmt.Println(err)
        return
    }
    data, err := io.ReadAll(f)
    if err != nil {
        fmt.Println(err)
        return
    }
    fmt.Println("File read successfully:", string(data))
    defer f.Close()
}

Delete files

Use os.Remove Function to delete files:

func main() {
    err := os.Remove("test.txt")
    if err != nil {
        fmt.Println(err)
        return
    }
    fmt.Println("File deleted successfully")
}

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